Engine-valve.



F. F. EMORY.

ENGINE VALVE. APPLICATION FILED MAR. 31, 1915.

.,l?2,l2l Patented Feb. 15 1916.

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ENGINE-VALVE.

Specification of Letters Patent.

Patented Feb. 15,1916.

Application filed March 31, 1915. Serial No. 18,368.

This invention relates to steam engine valves and the means foroperating the same, and more particularly to that type of engine valvescommonly known as puppet valves having double seats.

One of the objects of the present invention is the provlsion of a valveof simple construction, the same having suitable! guides whereby it iseffectively guided to its seat.

Another object is the provision of suitable means in theform ofadjustable cams carried by an oscillating member for operat-I ing thevalves to alternately open and close the inlet ports of the enginecylinder.

The inventive idea involved is capable of receiving a variety ofmechanical eX- pressions, one of which, for the purpose of illustratingthe invention, is shown in the accompanying drawing, in which- Figure 1is a side elevation, partly broken away and in section, of a steamengine cyl-I inder showing the invention applied thereto; Fig. 2 is adetail or side elevation of the valve and seats therefor used inconnection with the invention. Fig. 3 is a vertical longitudinalsectional view thereof. Fig. 4 is a plan view of the upper seat for thevalve, and Fig. 5 is a transverse section on the line 5-5 of Fig. 3.

Referring more particularly to the ac-- companying drawing, in whichlike reference characters indicate similar parts, the numeral indicatesthe cylinder of a steam engine having the usual piston 11 slidabletherein. The cylinder' is provided with the inlet ports 12 communicatingwith 'the steam chest 13, which may be of any preferred construction.

The steam chest 13 is provided contiguous to the ports 12 with upper andlower valve seats, 14 and 15, respectively, the same being in the formof externally screw threaded rings adapted for threaded en gagement withthe walls of the chest, the ring 15 being of larger diameter than thering14. A valve 16 is provided for each of the ports 12 and comprises abody portion having longitudinal passages 16 extending therethrough topermit of the balancing of the valve, the latter being provided with theflanges 17 atl Ieach end for engagementy with the valve seats 14 and l5.For'the purpose of guiding the valve to its seat the same is provided atits bottom, with a plurality of upwardly extending lugs 18 adapted forengagement with suitable openings 19 formed in the lower valve seat 15.For further aid in guiding said valves the upper seat 14 is providedwith a plurality of depending lugs-20 adapted for engagement with theperiphery of the upper flange 17. The upper end of the valve 16 hassecured thereto one end of a valve stem 22 extending upwardly through astutling box 23 carried by the top of the valve chest 13.

The steam chest has mounted thereon adjacent each end of the cylinder 10a standard 24 having a plurality of laterally extending arms 25 withsuitable openings therein for the reception of the valve stem 22. Saidstem'is provided with a collar 26 adjacent the upper 'end thereof, .andbetween said collar and the lower arm 25, a coiled spring 427 is mountedfor returning the valve 16 to its seat after the same has been operated.

Mounted upon the top of the cylinder 10 is a suitable oil'reservoir 28adapted to con tain `a lubricant for the parts which are mountedtherein. A shaft 29 passes through the reservoir 28 and is connected toa crank 30 oscillated froml a source (not shown). The shaft 29 also hassecured thereto a member 31 in the form of a segment having at each endthereof a cam 32 secured by fastenings 33 and made adjustable by meansof the screw threaded bolt 34 projecting beyond the end of the segment,said cams being made adjustable for the purpose of regulating theoperation of the valve 16. Each cam 32 is adapted to engage one end of alever 35 pivoted at 36, the other end of said lever engaging the top ofthe collar 26 carried bv the valve stem 22, said lever being rocked uponengagement with the cam and operating to depress the valve stem in orderto lower the valve and open the port. It is obvious from an inspectionof Fig. l that the cams operate the levers 35 alternately so that theintake to the cylinder 10 is properly regulated.

I claim:-

l. In an engine, the combination of a cylinder, inlet ports therefor,upper and lower Valve seats for said ports, a valve for` each of saidports, said valve being provided at each end thereof with acircumferential ilange adapted for engagement With the correspondingvalve seat, upwardly extending lugs carried by said Valve and vadaptedfor engagement With said lower seat, said upper seat being provided-With lcylinder, intake a plurality of depending gnidev'llugs adaptl edfor engagement with the flange formed upon the adjacent end of saidvalve, and a valve stem secured to said valve.

2. In an engine, the combination of a ports therefor, Valve seats insaid ports, a valve foreach port and adapted to engage the seatstherein, and means carried by said Valve and one of said seats andlcoperating with the other seat and said Valve, respectively, for guidingthe 2 latter.

FRANCIS Fl nMoni.

